Returning a submit value

I am new to HTML through a programming language. A while back I was trying to get some info from a website (auto-update idea), but when I access the website for the first time, it asks me to click a radio button and click submit. The code is below. I am wondering how I can submit this info so I can check for updates off the site:

[code]

Tools Catalog

Please Choose:

Vents Air Ducts

[/code]

Any help would be appreciated. I wrote the original program in delphi, but have now switched to c#. Info or code for either is fine. Thanks.